One of the main advantages of twin turbocharging a 4 cylinder engine is the increased horsepower and torque. Twin turbocharging can also improve engine response, enhance fuel efficiency, and allow the engine to maintain boost pressure at high RPMs.
Installing a turbo charger without reducing the compression ratio of the engine will put a lot of stress on the engine and it won't last for long. Doing it properly would be very costly. The commercially available kits do work but as I said, just bolting it on will reduce the reliability of the engine.
With a 4-cylinder engine, a single turbocharger is sufficient to deliver the required amount of compressed air. However, two turbos on 4-cylinders have been used in the past. The 1999 Subaru Legacy B4 is one such example.
How much horsepower does a twin turbo add depends on various factors. Factors including the size of the turbos, the boost level, the engine's compression ratio, and other modifications to a twin turbo setup can add a significant amount of horsepower to an engine, ranging from 50 to 1000+ horsepower.
Nevertheless, there are some four-cylinder engines that are surprisingly faster than a V8. These engines usually have turbos or are supercharged, making them capable of giving V8s a run for their money.
The 2.0-L Turbocharged Flat-4 is capable of inducing 365 hp and 317 lb-ft of torque. It can propel the car from 0-60 mph in 4.9 seconds and reach a top speed of 196 mph.
The most powerful 4-cylinder car engine is fitted in the upcoming 2024 Mercedes-AMG CL45 S. This 2.0-liter turbocharged I4 engine makes 416 HP and 369 LB-FT of torque.
It's best used in “v” engines (V6 and V8) because then each turbocharger can be assigned to one cylinder bank, which cuts down on the amount of exhaust piping needed for the system.
Although today's turbocharged four-cylinder engines do offer more absolute power than naturally aspirated V6s, the situation is usually different when you analyze powerplants in the same car lineup.
In general, adding a turbocharger to an engine will add anywhere from 40 hp to 300 hp, but in some cases, much more. In my eyes, a healthy boost of power would be around 50%. For instance, if your engine has 200 hp, you can push it to 300 hp without many reliability issues.
Single turbo systems are typically more efficient because the exhaust gases travel along a simpler, more direct route. Twin-turbo systems can make more power because they produce more boost. However, they are typically more complex.
Modern turbocharged four-cylinder engines, when engineered properly, will either beat or match a naturally aspirated V6 in almost every category. Turbo-fours are lighter, more efficient, and can be more powerful than a naturally aspirated V6. The only thing that a V6 will always do better is towing capacity.
In general, you will get more fuel economy from a 4-cylinder engine. You will typically get more power and performance from a 6-cylinder engine. If you are in the market for a smaller car, you will likely have a 4-cylinder engine.
The longer you drive your car with a blown turbo, the more damage the engine will have and therefore the more costly it will be to repair.
Lighten the weight of your car by switching to lighter wheels and tires, removing non-essential components such as AC, or taking out the spare tire and car jack. Get a tuneup—especially if your car hasn't had one within the past 50,000 miles. Add a turbocharger or supercharger to the engine. Add a cold-air intake.
A supercharger or turbocharger is one easy way to increase volumetric efficiency. So is a better engine airflow system. More compression can help.
Vehicles with a V8 tend to have more horsepower than vehicles with a V6, although this varies depending on the components of the engine. V8 engines generally have more torque although, the difference can be minimal in some models. The power of eight cylinders allows for heavier hauls and higher towing capacity.
V-6 engines have improved performance compared to V-8 engines, especially when timing acceleration properly because there's less tendency to drift to the outer edge. However, you can lose a little bit of the power ceiling with the weight advantage.
Yes, a turbo can be installed on a car that doesn't have one from the factory. However, there's much, much more to it than simply buying a turbo and bolting it into the exhaust.
You may have guessed that twin-turbocharged engines feature two turbochargers. If you did, you were right, because that's exactly what twin-turbocharged engines are. Engines with two turbochargers increase air and fuel intake nearly twice as much as the same engine would without a turbocharger.
A turbocharger works with the exhaust system and can potentially give you gains of 70-150 horsepower. A supercharger is connected directly to the engine intake and could provide an extra 50-100 horsepower.
The 2.0-liter M139 engine produces 416 horsepower and 354 lb-ft of torque. The car's acceleration is impressive; it can hit 100 km/h in four seconds and top out at 168 mph. The CLA45 S is the most powerful production compact car in the world.
Due to its smaller size and fewer moving parts, a 3-cylinder engine can achieve better fuel efficiency than a 4-cylinder engine. Additionally, a 3-cylinder engine is often lighter than a 4-cylinder engine, making it a good choice for compact cars and vehicles that require good fuel efficiency.
A twin-turbo setup also provides for the reduction of the lag. It helps produce power faster using 4 cylinders, while a single turbo requires all 8 cylinders for an optimal boost. This type of engine is excellent for regular driving in a city or a normal regime. Twin-turbo takes care of smooth engine functioning.